WHY THE HELL IS MY COMPUTER SO DAMN SLOW?!?

It was fine less than a week ago, but all of a sudden it's taking ages to catch up on typing, when I try to open a program it takes over five minutes (for little things like Word), and even completely loaded videos on the internet (that I've kept open just in case my parents turn the internet off) are... show more It was fine less than a week ago, but all of a sudden it's taking ages to catch up on typing, when I try to open a program it takes over five minutes (for little things like Word), and even completely loaded videos on the internet (that I've kept open just in case my parents turn the internet off) are sketchy at best-- the sound preceding the video, which itself is almost like going through a slideshow semi-acceptably fast. I've tried deleting unwanted programs and uninstalling different toolbars, but if anything it got slower after that. It's unbelievably frustrating! HELP!
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